EP1020639A2 - Kraftstoffeinspritzventil mit gepulster Luftunterstützung - Google Patents

Kraftstoffeinspritzventil mit gepulster Luftunterstützung Download PDF

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Publication number
EP1020639A2
EP1020639A2 EP99126034A EP99126034A EP1020639A2 EP 1020639 A2 EP1020639 A2 EP 1020639A2 EP 99126034 A EP99126034 A EP 99126034A EP 99126034 A EP99126034 A EP 99126034A EP 1020639 A2 EP1020639 A2 EP 1020639A2
Authority
EP
European Patent Office
Prior art keywords
fuel
air
valve
mixing chamber
fuel injector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99126034A
Other languages
English (en)
French (fr)
Other versions
EP1020639A3 (de
EP1020639B1 (de
Inventor
Jeff B. Pace
Vernon R. Warner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive Systems Inc
Original Assignee
Siemens Automotive Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Automotive Corp filed Critical Siemens Automotive Corp
Publication of EP1020639A2 publication Critical patent/EP1020639A2/de
Publication of EP1020639A3 publication Critical patent/EP1020639A3/de
Application granted granted Critical
Publication of EP1020639B1 publication Critical patent/EP1020639B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/047—Injectors peculiar thereto injectors with air chambers, e.g. communicating with atmosphere for aerating the nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M67/00—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type
    • F02M67/02—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type the gas being compressed air, e.g. compressed in pumps

Definitions

  • This invention relates to air assist fuel injectors used in internal combustion engines and in particular to a fuel injector with a pulsed air assist atomizer.
  • the present invention provides a fuel injector which supplies pulsed air, rather than a continuous supply of air through the fuel injector. By supplying pulsed air, the atomization and fuel spray targeting are improved.
  • the fuel injector includes air inlet means, fuel inlet means, a mixing chamber and control means for simultaneously controlling introduction of air and fuel into the mixing chamber.
  • the fuel injector includes two electromagnetically actuated valves that are used to control an air jet that impacts fuel flowing into a mixing chamber.
  • the controlled air and fuel flows provide atomization of the fuel before discharge of the air-fuel mixture from the injector.
  • the two valves are part of an armature/valve assembly.
  • the assembly includes an armature, air control valve head and hollow needle which forms part of a fuel control valve.
  • the armature is connected to the hollow needle.
  • the air control valve head is mounted on a first axial inlet end of the hollow needle.
  • valve head and a second axial outlet end of the needle are seated against an air valve seat and fuel valve seat, respectively, to prevent air and fuel flow into the mixing chamber.
  • the armature is attracted to a stator and the valve head and needle are lifted from their seats to allow air and fuel flow into the mixing chamber.
  • the fuel As the fuel enters the mixing chamber, it is impacted by the air jet resulting in a finely atomized spray. Then the air-fuel mixture is discharged from the fuel injector through a central opening in the fuel valve seat.
  • numeral 10 generally indicates a fuel injector including a pulsed air assist atomizer.
  • the fuel injector 10 provides a pulsed air jet that impacts the fuel when fuel is being discharged from the injector 10, and not as a continuous air supply as in conventional air assist injectors, thereby improving the atomization of the fuel.
  • the injector 10 includes a plastic cover 12.
  • the plastic cover 12 surrounds upper portions of a tubular stator 14 and a coil assembly housing 16.
  • Coil assembly 18 surrounds a lower portion of stator 14.
  • Stator 14 is ferromagnetic and has an air inlet 20 at a first axial end 22 of the stator 14 connected to a pressurized air supply 23.
  • a valve body 24 below the coil assembly 18 is a valve body 24 in which an armature 26 is reciprocally disposed and positioned coaxially with a second axial end 28 of the stator 14.
  • the armature 26 is connected with a hollow needle 30 which has an air control valve head 32 mounted on a first axial inlet end 34 of the needle 30 to form an armature/valve assembly 36.
  • the valve head 32 may be in the form of a poppet valve.
  • the armature/valve assembly 36 is movable between open and closed positions to permit or prevent air and fuel flow into a mixing chamber 38 at the discharge end of the fuel injector.
  • the valve head 32 and a second axial outlet end 40 of the needle 30 are normally urged against an air valve seat 42 and a fuel valve seat 44, respectively, in their closed positions by a spring 46 which engages the valve head 32.
  • the spring 46 is compressed to desired force by an adjustment tube 48 which is pressed to an axial position within the stator 14 and defines the air inlet 20.
  • the air valve seat 42 forms one end of a valve tube 50 which is pressed to a mounted axial position within the stator 14.
  • the valve tube 50 extends from the spring 46 to the second axial end 28 of the stator 14.
  • the needle 30 and valve head 32 are simultaneously unseated from their seats 44, 42 to their open positions to allow fuel and air flow in the mixing chamber 38 when the armature 26 is magnetically attracted to the stator 14 upon energization of the coil assembly 18.
  • the coil assembly 18 includes a plastic bobbin 52 on which an electromagnetic coil 54 is wound. Electrical terminals 56 are connected between an electrical circuit (not shown) and the coil 54 for providing energizing voltage to the coil that operates the fuel injector 10.
  • the hollow needle 30 has a central air passage 60 extending from the first axial inlet end 34 of the needle 30 to the second axial outlet end 40 of the needle 30.
  • the air passage 60 conveys air from the air inlet 20 to the mixing chamber 38. Air enters the air passage 60 through air holes 62 in the first axial end 34 of the needle 30 as shown in FIG. 3.
  • the diameter of the hollow needle 30 may be larger than a conventional valve needle to accommodate the air passage 60. If a needle 30 with a larger diameter is used, a lower valve lift is required to pass the fuel thereby supplying a thinner fuel film which enhances atomization from the air jet.
  • the armature 26 is guided by an inside wall of the valve body 24 for axial reciprocation.
  • the upper portion of the hollow needle 30 is guided within the valve tube 50.
  • axial guidance for the needle 30 is provided by a fluid metering member 66 through which the hollow needle 30 extends.
  • the fluid metering meter 66 is disposed within the valve body 24 upstream from the fuel valve seat 44.
  • a filter assembly 70 is fitted to the fuel inlets 68 to filter particulate matter from the fuel entering the valve body 24 through the inlets 68.
  • Filtered fuel flows through the fluid metering member 66 which provides a thin fuel film to be impacted by the air jet from the second axial end 40 of the hollow needle 30 in the mixing chamber 38.
  • the fluid metering member 66 may be a swirl generator plate or an orifice plate.
  • the member 66 is located upstream from the mixing chamber 38.
  • the air-fuel mixture may be metered by a second metering member 72, such as a thin orifice disk, located downstream from the fuel valve seat 44 at the discharge end of the fuel injector 10.
  • fuel enters the fuel inlets 68 and passes through the filter assembly 70 into the valve body 24 and through the fluid metering member 66 to the fuel valve seat member 44.
  • the coil 54 When the coil 54 is not energized, the hollow needle 30 and air control valve head 32 are biased by the spring 46 into their respective closed positions and a small working gap 74 exists between the armature 26 the stator 14.
  • the armature 26 Upon energizing of the coil 54, the armature 26 is magnetically attracted to the second axial end 28 of the stator 14, closing the working gap 74. This movement simultaneously unseats the hollow needle 30 from the fuel valve seat 44 and lifts the air control valve head 50 from the air valve seat 42, allowing fuel film to be impacted by an air jet in the mixing chamber 38, resulting in a finely atomized spray. The atomized spray is discharged from the fuel injector through a central opening 76 in the fuel valve seat 44.
  • the spring 46 Upon deenergizing of the coil 54, the spring 46 pushes the hollow needle 30 and air control valve head 32 back to their closed positions, shutting off fuel and air flow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
EP99126034A 1999-01-11 1999-12-27 Kraftstoffeinspritzventil mit gepulster Luftunterstützung Expired - Lifetime EP1020639B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/228,171 US6209806B1 (en) 1999-01-11 1999-01-11 Pulsed air assist fuel injector
US228171 1999-01-11

Publications (3)

Publication Number Publication Date
EP1020639A2 true EP1020639A2 (de) 2000-07-19
EP1020639A3 EP1020639A3 (de) 2002-10-30
EP1020639B1 EP1020639B1 (de) 2004-03-03

Family

ID=22856101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99126034A Expired - Lifetime EP1020639B1 (de) 1999-01-11 1999-12-27 Kraftstoffeinspritzventil mit gepulster Luftunterstützung

Country Status (3)

Country Link
US (1) US6209806B1 (de)
EP (1) EP1020639B1 (de)
DE (1) DE69915244T2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1425507A1 (de) * 2001-09-13 2004-06-09 Synerject, Llc Führungsanordnung für luftunterstützte kraftstoffeinspritzventile
WO2010027573A2 (en) 2008-08-27 2010-03-11 Woodward Governor Company Dual action fuel injection nozzle
EP2557308A1 (de) * 2010-04-08 2013-02-13 Toyota Jidosha Kabushiki Kaisha Kraftstoffeinspritzventil

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4158187B2 (ja) * 2000-05-12 2008-10-01 株式会社デンソー 燃料噴射弁
DE10061035A1 (de) * 2000-12-08 2002-06-13 Fev Motorentech Gmbh Einspritzeinrichtung zum dosierten Einspritzen von zwei Flüssigkeiten in einem Reaktionsraum
DE10156657C2 (de) * 2001-11-17 2003-12-04 Daimler Chrysler Ag Zweistoff-Injektor
US6859953B1 (en) * 2002-09-13 2005-03-01 Steven E. Christensen Jet propulsion system for spa or jetted bath using control of air draw to Venturi jets with a three-way air control valve
US20050106035A1 (en) * 2002-10-29 2005-05-19 Nobuo Aoki High flow rate fuel valve and fuel supply pump with the valve
US7159801B2 (en) * 2004-12-13 2007-01-09 Synerject, Llc Fuel injector assembly and poppet
EP2589792B1 (de) 2010-07-01 2015-09-02 Toyota Jidosha Kabushiki Kaisha Brennstoffeinspritzventil und verbrennungsmotor
US10302058B2 (en) * 2013-04-05 2019-05-28 Enginetics, Llc Co-axial dual fluids metering system and methods
DE102013014329B4 (de) * 2013-08-07 2017-03-23 L'orange Gmbh Brennverfahren für eine Brennkraftmaschine
EP2837813B1 (de) * 2013-08-14 2016-04-06 Continental Automotive GmbH Ventilanordnung für ein Einspritzventil und Einspritzventil
EP3443216B1 (de) 2016-05-16 2022-07-06 Cummins Inc. Wirbelinjektorkolben
CN110195672B (zh) * 2019-06-14 2020-06-30 清华大学 利用超音速气流增强雾化的喷油器
CN112218724A (zh) * 2019-08-30 2021-01-12 深圳市大疆创新科技有限公司 农业植保无人机的机载喷头结构、喷洒系统及无人机
CN114962100B (zh) * 2022-06-07 2023-04-25 一汽解放汽车有限公司 一种双相预混合喷射器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834291A (en) * 1987-11-19 1989-05-30 Brunswick Corporation Fuel injector
EP0384473A1 (de) * 1989-02-22 1990-08-29 Yamaha Hatsudoki Kabushiki Kaisha Brennkraftmaschine mit Kraftstoffeinspritzeinheit
US4971254A (en) * 1989-11-28 1990-11-20 Siemens-Bendix Automotive Electronics L.P. Thin orifice swirl injector nozzle
US5148788A (en) * 1991-06-19 1992-09-22 Hitachi America, Ltd. Air-assist fuel injection system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1402749A (en) * 1919-07-30 1922-01-10 Pont Eleuthere Paul Du Fuel-feeding system for internal-combustion engines
US1627727A (en) * 1923-01-29 1927-05-10 James A Charter Constant-compression internal-combustion engine
US5119792A (en) * 1991-01-07 1992-06-09 Industrial Technology Research Institute Electromagnetic fuel injector with central air blow and poppet valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834291A (en) * 1987-11-19 1989-05-30 Brunswick Corporation Fuel injector
EP0384473A1 (de) * 1989-02-22 1990-08-29 Yamaha Hatsudoki Kabushiki Kaisha Brennkraftmaschine mit Kraftstoffeinspritzeinheit
US4971254A (en) * 1989-11-28 1990-11-20 Siemens-Bendix Automotive Electronics L.P. Thin orifice swirl injector nozzle
US5148788A (en) * 1991-06-19 1992-09-22 Hitachi America, Ltd. Air-assist fuel injection system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1425507A1 (de) * 2001-09-13 2004-06-09 Synerject, Llc Führungsanordnung für luftunterstützte kraftstoffeinspritzventile
EP1425507A4 (de) * 2001-09-13 2004-10-06 Synerject Llc Führungsanordnung für luftunterstützte kraftstoffeinspritzventile
US7104477B2 (en) 2001-09-13 2006-09-12 Synerject, Llc Air assist fuel injector guide assembly
WO2010027573A2 (en) 2008-08-27 2010-03-11 Woodward Governor Company Dual action fuel injection nozzle
EP2329134A2 (de) * 2008-08-27 2011-06-08 Woodward, Inc. Kraftstoffeinspritzdüse mit doppelfunktion
EP2329134A4 (de) * 2008-08-27 2013-05-29 Woodward Inc Kraftstoffeinspritzdüse mit doppelfunktion
US9291139B2 (en) 2008-08-27 2016-03-22 Woodward, Inc. Dual action fuel injection nozzle
EP2557308A1 (de) * 2010-04-08 2013-02-13 Toyota Jidosha Kabushiki Kaisha Kraftstoffeinspritzventil
EP2557308A4 (de) * 2010-04-08 2013-09-25 Toyota Motor Co Ltd Kraftstoffeinspritzventil

Also Published As

Publication number Publication date
EP1020639A3 (de) 2002-10-30
EP1020639B1 (de) 2004-03-03
DE69915244D1 (de) 2004-04-08
US6209806B1 (en) 2001-04-03
DE69915244T2 (de) 2005-04-14

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